package com.kcnet.qk.util;

import android.content.Context;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.content.pm.PackageManager.NameNotFoundException;
import android.os.Build;
import android.os.Environment;
import android.text.TextUtils;
import android.util.Log;

import com.kcnet.qk.constant.Const;


import java.io.File;
import java.io.FileOutputStream;
import java.io.FilenameFilter;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.io.Writer;
import java.lang.Thread.UncaughtExceptionHandler;
import java.lang.reflect.Field;
import java.util.Arrays;
import java.util.Properties;
import java.util.TreeSet;



public class CrashHandler implements UncaughtExceptionHandler {
    /**
     * Debug Log tag
     */
    public static final String TAG = "CrashHandler";
    /**
     * 是否开启日志输出,在Debug状态下开启,
     * 在Release状态下关闭以提示程序性能
     */
    public static final boolean DEBUG = true;
    /**
     * 系统默认的UncaughtException处理类
     */
    private UncaughtExceptionHandler mDefaultHandler;
    /**
     * CrashHandler实例
     */
    private static CrashHandler INSTANCE;
    /**
     * 程序的Context对象
     */
    private Context mContext;

    /**
     * 使用Properties来保存设备的信息和错误堆栈信息
     */
    private Properties mDeviceCrashInfo = new Properties();
    private static final String VERSION_NAME = "versionName";
    private static final String VERSION_CODE = "versionCode";
    private static final String DOMAIN = "domain";
    private static final String STACK_TRACE = "STACK_TRACE";
    /**
     * 错误报告文件的扩展名
     */
    private static final String CRASH_REPORTER_EXTENSION = ".txt";
    private static final String CRASH_NATIVE_REPORTER_EXTENSION = ".dmp";
    private static final String CRASH_DIE = "crash";
    //	private static final String UPLOAD_URI = "http://whistle.ruijie.com.cn:1084/ms2/gathercrash.php";
   // private static HttpClient client;

    /**
     * 保证只有一个CrashHandler实例
     */
    private CrashHandler() {

    }

    /**
     * 获取CrashHandler实例 ,单例模式
     */
    public static CrashHandler getInstance() {
        if (INSTANCE == null) {
            INSTANCE = new CrashHandler();
        }

        return INSTANCE;
    }

    /**
     * 初始化,注册Context对象,
     * 获取系统默认的UncaughtException处理器,
     * 设置该CrashHandler为程序的默认处理器
     *
     * @param ctx
     */
    public void init(Context ctx) {
        mContext = ctx;
        mDefaultHandler = Thread.getDefaultUncaughtExceptionHandler();
        Thread.setDefaultUncaughtExceptionHandler(this);
    }

    /**
     * 当UncaughtException发生时会转入该函数来处理
     */
    @Override
    public void uncaughtException(Thread thread, final Throwable ex) {
        if (!handleException(ex) && mDefaultHandler != null) {
            //如果用户没有处理则让系统默认的异常处理器来处理
            mDefaultHandler.uncaughtException(thread, ex);
        } else {
            //Sleep一会后结束程序
            try {
                Thread.sleep(3000);
            } catch (InterruptedException e) {
                Log.e(TAG, "Error : ", e);
            }

            closeApp();
        }
    }

    private void closeApp() {
        if(mContext != null) {
//			MobclickAgent.onKillProcess(mContext);
        }

        android.os.Process.killProcess(android.os.Process.myPid());
        System.exit(1);
    }

    /**
     * 自定义错误处理,收集错误信息
     * 发送错误报告等操作均在此完成.
     * 开发者可以根据自己的情况来自定义异常处理逻辑
     *
     * @param ex
     * @return true:如果处理了该异常信息;否则返回false
     */
    private boolean handleException(Throwable ex) {
        if (ex == null) {
            return true;
        }
//        MobclickAgent.reportError(mContext, ex);
        Log.d("mq", "fatal   uncaught exception! " + ex.toString());
        ex.printStackTrace();
        //收集设备信息
        collectCrashDeviceInfo(mContext);
        //保存错误报告文件
        String crashFileName = saveCrashInfoToFile(ex);
        if (!TextUtils.isEmpty(crashFileName)) {
            //TODO 上传错误报告
//			sendCrashReportsToServer(mContext);
        }
        return true;
    }

    /**
     * 在程序启动时候, 可以调用该函数来发送以前没有发送的报告
     */
    public void sendPreviousReportsToServer() {
        sendCrashReportsToServer(mContext);
    }

    /**
     * 把错误报告发送给服务器,包含新产生的和以前没发送的.
     *
     * @param ctx
     */
    public void sendCrashReportsToServer(final Context ctx) {
        String[] crFiles = getCrashReportFiles(ctx);
        if (crFiles != null && crFiles.length > 0) {
            TreeSet<String> sortedFiles = new TreeSet<String>();
            sortedFiles.addAll(Arrays.asList(crFiles));

//            for (String fileName : sortedFiles) {
//                final File cr = new File(FileConstants.CRASH_LOG_PATH, fileName);
//            }
        }
    }

    /**
     * 获取错误报告文件名
     *
     * @param ctx
     * @return
     */
    private String[] getCrashReportFiles(Context ctx) {
        File filesDir = new File(FileUtils.getCrashPath());
        FilenameFilter filter = new FilenameFilter() {
            public boolean accept(File dir, String name) {
                return name.endsWith(CRASH_REPORTER_EXTENSION) || name.endsWith(CRASH_NATIVE_REPORTER_EXTENSION);
            }
        };
        return filesDir.list(filter);
    }

    /**
     * 保存错误信息到文件中
     *
     * @param ex
     * @return
     */
    private String saveCrashInfoToFile(Throwable ex) {
        try {
            String timestamp = TimeUtils.getCurrentTimeInString();
            String fileName = "crash-" + timestamp + CRASH_REPORTER_EXTENSION;
            File logDir = new File(FileUtils.getCrashPath());
            if (!logDir.exists()) {
                logDir.mkdirs();
            }
            File file = new File(logDir, fileName);
            FileOutputStream trace = new FileOutputStream(new File(logDir, fileName));
            mDeviceCrashInfo.store(trace, "");
            trace.flush();

            PrintWriter pw = new PrintWriter(trace);

            pw.append("============================ crash call stack ==================================\n");
            pw.append(getExceptionStack(ex));

            pw.append("============================ recent adb log ==================================\n");
//			pw.append(LogUtil.getRecentLog());

            pw.close();

            trace.close();

            return file.getPath();
        } catch (Exception e) {
            Log.e(TAG, "an error occured while writing report file...", e);
            e.printStackTrace();
        }
        return null;
    }

    private String getExceptionStack(Throwable ex) {
        Writer info = new StringWriter();
        PrintWriter printWriter = new PrintWriter(info);
        ex.printStackTrace(printWriter);

        Throwable cause = ex.getCause();
        while (cause != null) {
            cause.printStackTrace(printWriter);
            cause = cause.getCause();
        }

        String result = info.toString();
        printWriter.close();
        return result;
    }


    /**
     * 收集程序崩溃的设备信息
     *
     * @param ctx
     */
    public void collectCrashDeviceInfo(Context ctx) {
        try {
            PackageManager pm = ctx.getPackageManager();
            PackageInfo pi = pm.getPackageInfo(ctx.getPackageName(),
                    PackageManager.GET_ACTIVITIES);
            if (pi != null) {
                mDeviceCrashInfo.put(VERSION_NAME,
                        pi.versionName == null ? "not set" : pi.versionName);
                mDeviceCrashInfo.put(VERSION_CODE, String.valueOf(pi.versionCode));
            }
        } catch (NameNotFoundException e) {
            Log.e(TAG, "Error while collect package info", e);
        }
        //使用反射来收集设备信息.在Build类中包含各种设备信息,
        //例如: 系统版本号,设备生产商 等帮助调试程序的有用信息
        //具体信息请参考后面的截图
        Field[] fields = Build.class.getDeclaredFields();
        for (Field field : fields) {
            try {
                field.setAccessible(true);
                mDeviceCrashInfo.put(field.getName(), String.valueOf(field.get(null)));
                if (DEBUG) {
                    Log.d(TAG, field.getName() + " : " + field.get(null));
                }
            } catch (Exception e) {
                Log.e(TAG, "Error while collect crash info", e);
            }

        }

    }

    /**
     * 文件删除
     *  文件保存天数
     */
//    public void autoClear(final int autoClearDay) {
//        FileUtil.delete(getGlobalpath(), new FilenameFilter() {
//
//            @Override
//            public boolean accept(File file, String filename) {
//                String s = FileUtil.getFileNameWithoutExtension(filename);
//                int day = autoClearDay < 0 ? autoClearDay : -1 * autoClearDay;
//                String date = "crash-" + DateUtil.getOtherDay(day);
//                return date.compareTo(s) >= 0;
//            }
//        });
//
//    }

    public static String getGlobalpath() {
        return Environment.getExternalStorageDirectory().getAbsolutePath()
                + File.separator + "crash" + File.separator;
    }
}  